Arrangement for stopping and starting a loom provided with automatic shuttle-changing means



Nov. 1, 1955 J. FUMAT ARRANGEMENT FOR STOPPING AND STARTING A LOOM PROVIDED WITH AUTOMATIC SHUTTLE-CHANGING MEANS 1951 4 Sheets-Sheet 1 Filed July 31.

Novrl, 1955 J. FUMAT- 2,722,239

ARRANGEMENT FOR STOPPING AND STARTING A LOOM PROVIDED WITH AUTOMATIC SHUTTLE-CHANGING MEANS Filed July 31, 1951 4 Sheets-Sheet 2 fiwemor Jose h Puma!- 1 0M} MAM we krr'ys 2,722,239 00M PROVIDED WITH AUTOMATIC SHUTTLE-CHANGING MEANS Filed July 51, 1951 J. FUMAT ARRANGEMENT FOR STOPPING AND STARTING A L Nov. 1, 1955 4 Sheets-Sheet 3 fzwen far Jase sh fT/m a 1'- Nov. 1, 1955 J. FUMAT ,722,239

ARRANGEMENT FOR STOPPING AND STARTING A LOOM PROVIDED TLE-CHANGING MEANS WITH AUTOMATIC SHUT Filed July 31 1951 4 Sheets-Sheet 4 United States Patent Ofiiice 2,722,239 Patented Nov. 1, 1955 ARRANGEMENT FOR STOPPING AND STARTING A LOOM PROVIDED WITH AUTOMATIC SHUT- TLE-CHANGING MEANS Joseph Fumat, Caluire, France, assignor to S. O. M. I. M. Societe de Montage pour llndustrie Mecanique, Caluire, France, a company of France Application July 31, 1951, Serial No. 239,451 Claims priority, application France August 3, 1950 Claims. (Cl. 139-227) In most automatic shuttle-changing devices, the stoppage of the loom is provided through a cam keyed to the lower shaft of the loom or shuttle-driving shaft and acting on a combination of levers of which some are submitted to the action of springs for declutching and braking purposes during the change of shuttles. A second cam that is independent of the first one is then required for restarting the loom.

In order to make the structure of such a device simpler and in order to reduce its cost price while improving its operation, it. is of interest to reduce the number of its parts.

The present invention has consequently for its object an arrangement for controlling the stopping and the starting of a loom incorporating automatic shuttle-changing means, wherein a cam keyed to the cam-shaft and acting on some predetermined part produces simultaneously the declutching and the braking of the loom during the change of shuttle and its subsequent starting.

This arrangement covers also the means cooperating with said cam for producing its rotation during which rotation different operations are performed as disclosed hereinafter.

Accompanying drawings illustrate by way of example a preferred embodiment of the invention. In said drawings:

Figs. 1 and 2 are elevational partly sectional transverse views respectively through lines 1-1 and 22 of Fig. 3.

Fig. 3 is a partly sectional view through the cam shaft.

Fig. 4 is an elevational side view of the grooved cam controlling the stopping and the starting of the loom, said figure including a section through line 44 of Fig. 3.

Fig. 5 shows an arrangement adapted for the control of the device illustrated in Fig. 1.

Fig. 6 is a simplified general view of a shuttlechanging system provided with a device according to my invention and incorporating the weft feeler controlling said device.

When the loom is operative, a rotary member 2 keyed to the shuttle-driving spindle 3 of the loom acts, through its boss 2a, once for every two revolutions of the crankshaft that is not illustrated on the drawing, on the roller 5 carried by the lever 4 which latter is urged into permanent contact through its roller 5 with said member 2 by the return spring 6.

The lower end of the lever 4 that is pivotally secured at 7 is connected with a lever 8 terminated by a hook 9 moving by a predetermined amount in the direction of the arrow 10 each time the member 2 executes a complete revolution.

Each time a shuttle requires replenishing, the brass ring fitted round the cop 82 (Fig. 6) closes the circuit through the two needles forming the shuttle feeler 81. This energizes the eleetromagnet 83 and draws in the lever 84 which rocks so as to raise the lever 11 in the direction of the arrow 12, as illustrated in Figs. 1, 5 and 6. This arrangement is conventional and requires no further description. Under the action of the spring 13, the pusher member 14, which is released by reason of the rising movement of the lever is shifted upwardly by the spring 13 so as to urge in the same direction the roller 15 which carries along with it the lever 16 carrying the vertical rod 17. The upward movement of said rod 17 lifts the hook 9 at the end of the lever 8 so as to bring it into register with the trunnion 18 illustrated in Fig. 1 and secured to the lever 19. The rocking of said lever 19 round its pivot 20 in the direction of the arrow 21 provides for a pivoting movement of the block 22 controlling the spacing of the jaws 23 that are adapted to pivot at 24 while their free ends 23a, 23b, are urged towards each other into contact with said block 22 by the spring 25. The jaws 23 that are thus urged against the wall of the drum 26 hold the latter fast which provides for the operative engagement of the shaft 27 carrying the cam of the shuttle changing means and the cam 30 controlling the stopping and starting of the loom, as will be disclosed hereinafter.

Turning to Fig. 3, it is apparent that the chain wheel 28 assuming a continuous rotary movement is rigid with the socket 29 carrying at its end opposed to said wheel a series of teeth 31 and mounted freely over the shaft 27 which latter is carried in a frame 61 the end plates of which are held fast by stays such as 54 and 62.

The teeth 31 drive the planet pinions 32 and 33 the pivots of which are carried by the flange 34 carrying the drum 26 which is thus driven into rotation during idle operation. The flange 34 is also rigid with a socket 35 mounted loose over the socket 29 and arranged coaxially with the latter and with the shaft 27. A stationary plate 63 carried by a further stay 62 forms a lateral cover for the drum 26 cooperating with the jaws 23.

When the operative shuttle is to be changed, the hook 9 that is brought into register with the trunnion 18 carries the latter along with it in the direction of the arrow 10 under the action of the boss 2a on the member 2 engaging the roller 5. The ensuing pivotal movement of the lever 19 urges the jaws 23 against the inner wall of the drum 26 that is thus held fast. Through the agency of the inner teeth 37 on the plate 36 that engage the planet pinion 33, the latter which rotates now round an axis that is stationary in space, transmits to the plate 36 the rotary movement it receives through the planet pinion 32 from the teeth 31 on the socket 29. As this plate 36 is rigid with the shaft 27, it carries the latter along with it and ensures a rotary movement for the cams keyed to said shaft. This provides the engagement of the shaft 27 mentioned hereinabove.

Fig. 4 shows the roller 38 and the lever 39, controlling the stopping and the restarting of the loom, in three different positions, to wit: During normal operation of the loom the control lever 39 occupies the position A (Fig. 4); the position B corresponds to disengagement of the loom; the position C corresponds to rearward movement of the loom.

The roller 38 carried by the lever 39 enters during normal operation a recess 40 so as to lie in contact with the part 42a of the annular race 42 on the grooved cam 30. At the moment of the change of shuttle, the lever 39 carrying the roller 38 engaged positively inside the guideway 49 in the cam 30 (Fig. 4) is shifted by a predetermined amount in the direction of the arrow 44. Its shifting provides a corresponding shifting of the connecting rod 41 which constrains the braking cam 65 (Fig. 6) to pivot so as to release the roller 66 at the end of the braking lever 67. The latter is then urged by a spring 68 into a posi- 3 tion for which it shifts the friction strip 69 into its operative position against the fiywheel 70.

At the same time, the loom is disconnected, as provided by the bell crank 115 (Figs. 4 and 6) that is keyed to the same spindle 116 as the cam 65 and is connected with the clutch-controlling lever 71 through the link 72 so as to produce the shifting of the actual clutch members that are enclosed inside the casing 73. This arrangement is also quite conventional and has been briefly described merely to show the operation of my improved arrangement as a whole.

Obviously, the lever 39 may be coupled with any other arrangement controlling a suitable mechanism providing for the disengagement and braking of the loom.

When revolving with the shaft 27 in the direction of the arrow 43 (Fig. 4), the slope 42a on the cam 30 urges the roller 38 in the direction of the arrow 44 in a manner such that the lever 39 is immediately brought into the position B corresponding to the disengagement of the loom.

During the stoppage thus ensuing, the shuttle changing means are controlled in the usual manner by the cams 45 and 46 that are caused to rotate with the shaft 27 together with the cam 30. A little before the end of its rotation, the slope 48 on the cam 30 is adapted by reason of the shape given to it, to come into contact with the roller that is held in the groove 49 in the cam so that the roller 38 and therewith the lever 39 are urged back into the position A corresponding to the engagement of the loom with its driving means.

When restarting the loom, the shaft 27 carrying the cams required for controlling the change of shuttles, is disconnected. For this purpose, a few degrees before the shaft 27 enters its final position, the stud 51 (Figs. 2 and 3) carried by the side wall of the plate 36 comes into contact with the nose 52 on the lever 53. The latter is mounted loose on the stay 54 and carries then along with it the socket 55 rigid therewith together with the lever 56, the socket 55 being also mounted loose on the stay 54. A pin 57 carried by the outer end of the lever 56 engages consequently the jaw controlling lever 8, the hook 9 of which is released with reference to the trunnion 18 and releases the latter. While it is sinking, the lever 8 bears on the pin 58 rigid with the rod 17 that is thus drawn downwardly. This downward movement urges the roller onto the pusher member 14 which reenters thus its operative position as it is submitted to downwardly directed pressure so that the cop feeling means enter their normal operative position.

The plate 36 is also provided with means for stopping the shaft 27 for a stationary position thereof. These means include a roller 59 carried by a lever 61' and urged by a spring 62 against the periphery of said plate. At the end of a predetermined operative stage, a notch 63 in a suitable angular position on the periphery of the plate 36 comes into register with the roller 59 which engages it and holds thus the plate 36 and thereby the cam shaft fast in an angular position that is permanently defined.

A hand-controlled clutch lever that is not illustrated is adapted to act on the link 115 so as to bring the control lever 39 and its roller 38 into the third position C corresponding to rearward movement for the loom.

Obviously, the present invention is by no means limited to the above disclosed embodiment incorporating a mechanism for stopping and starting the loom and it covers also all other embodiments of the same arrangement designed with a view to controlling any system of shuttle changing means.

What I claim is:

1. In a loom having shuttle-changing means, the combination of a camshaft assuming normally a predetermined stationary angular position and adapted to control said shuttle changing means, a cam carried by said camshaft and incorporating a cam groove, a roller engaging said cam groove for positive actuation in both radial directions with reference to the camshaft, a loom disconnecting and braking mechanism, and a transmission between the roller and said mechanism, whereby the roller shifts the mechanism into its inoperative position and back into its operative position when the camshaft is moved into and out of its normal stationary position and means whereby said camshaft is urged to turn as soon as the shuttle requires changing.

2. In a loom of the type having a shuttle feeler and shuttle-changing means including spaced cams, the combination including a camshaft mounting said cams and assuming a predetermined stationary angular position controlling said shuttle changing cams, another cam carried by said camshaft, a cam follower controlled by last mentioned cam and means whereby said cam follower produces when the corresponding cam is shifted with the camshaft out of its normal angular setting, the disconnection and braking of the loom, a mechanism adapted to drive the camshaft, a mechanism controlled at each reciprocation of the shuttle of the loom and adapted to engage the camshaft with the mechanism adapted to drive it, means whereby the shuttle feeler of the loom, when operative, provides for operativeness of the last mentioned mechanism controlled at each reciprocation of the shuttle and means for stopping the camshaft in its predetermined angular position at the end of one complete revolution.

3. In a loom, the combination of means for controlling the changing of the shuttle of the loom including a pair of spaced cams, a camshaft assuming normally a predetermined stationary angular position and adapted to control said earns, another cam carried by said camshaft, a cam follower controlled by said last mentioned cam, means whereby said cam follower produces, when the corresponding cam is shifted with the camshaft out of its normal angular setting, the disconnection and braking of the loom, and means for shifting the camshaft out of its normal angular setting, each time the shuttle requires replenishing, including a lever, a spring-pressed plunger controlled by said lever, mechanism for turning the camshaft and means actuated by said plunger, whereby said last mentioned mechanism is rendered operative.

4. In a loom having shuttle-changing means, the combination of a camshaft assuming normally a predetermined stationary angular setting and adapted to control said shuttle-changing means when shifted angularly with reference to said setting, a cam carried by said camshaft, a cam follower controlled by last mentioned cam and means whereby said cam follower produces, when the corresponding cam is shifted with the camshaft out of its normal angular setting, the disconnection and braking of the loom, a shuttle feeler, a lever controlled by the latter, power means, a transmission operatively connecting said power means with the camshaft and including a disconnecting clutch, a spring normally urging said disconnecting clutch into its disengaged position to allow the transmission operated by the power means to shift the camshaft out of its normal angular setting and to control thereby the shuttle-changing means, a member adapted to normally hold the clutch in its disengaged condition and means whereby said feeler-operated lever urges said clutch-controlling member into an inoperative position and releases the clutch whenever the feeler is actuated by the shuttle upon the latter requiring replacement.

5. In a loom having shuttle-changing means, the combination of a camshaft assuming normally a predetermined stationary angular setting, a first cam on the camshaft controlling the shuttle-changing means, a second cam carried by said camshaft, a cam follower controlled by last mentioned cam and means whereby said cam follower produces, when the corresponding cam is shifted with the camshaft out of its normal angular setting, the disconnection and braking of the loom, a shuttle feeler, a lever controlled by the latter, power means, a transmission operatively connecting said power means with the camshaft and including a disconnecting clutch, a spring normally urging said disconnecting clutch into its disengaged position to allow the transmission operated by the power means to shift the camshaft out of its normal angular setting and to control thereby the shuttle-changing means, a member adapted to hold normally the clutch in its disengaged condition and means whereby said feeler-operated lever urges said clutch-controlling member into an inoperative position and releases the clutch whenever the feeler is actuated by the shuttle upon the latter requiring 10 replacement.

References Cited in the file of this patent UNITED STATES PATENTS Jackson June 23, 1914 Towler Dec. 28, 1920 Dickie et a1. Sept. 13, 1938 FOREIGN PATENTS Great Britain Sept. 15, 1938 

